Malicious PDF — malware analysis report

Static analysis result for SHA-256 4893ff4cab389ab1…

MALICIOUS

PDF

38.6 KB Created: 2020-08-19 19:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe5c8a85d027524cfae26b4f5e459dfd SHA-1: b7335f796c4842a2281cc04ded1e08ddc542b022 SHA-256: 4893ff4cab389ab1cc2fbf4c7bbf346786460493db2a89d0e4e0c008ab4244ce
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged for containing a large number of external links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body contains garbled text but includes the malicious URL, suggesting a lure to entice users to click on the malicious link. The primary attack pattern appears to be SEO poisoning or a link farm designed to distribute malicious content.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=vodafone+cartoon+ad+video
    • http://files.northwesthennepinfamilyservicecollaborative.com/uploads/1/3/1/3/131379382/204e9ddffa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/dpx_500_bt.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/csv_to_json_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0431/5329/3469/files/nivimurubewib.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/ludufotupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6264/files/patobezotebatiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9826/7029/files/obi_wan_lightsaber_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/zular.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/31231784773.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/d_d_phb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/14422746815.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/buzenoruvujegu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/voforuxigezawusixewuwub.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/from_inquiry_to_academic_writing_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/ribomut.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d4c.bin
545688b3a5a2140dd167e0b5c568adcd99706818d837abdb01fcc6536098ee13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D4C 4620 bytes
font_01_sfnt_off00005d10.bin
ddb5c2112c8773ddae4ca6d28bcea2dcaf1dc7426c6bf01c610ce37fc624db25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D10 10000 bytes
font_02_sfnt_off00007f4c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4C 4324 bytes

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